Measuring-pump.



F. W. MEEGANQ MEASURING PUMPx APPLICAUON FILED Ir'sAY 4, talc-1 Patented Feb. 22, 1916.

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F. W. MEEGAN MEASURING PUMP. APPLICATlON FILED MAY 4', 191v.

Patented Feb. 22, 1916.

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A 3;) 13 MA a ttozmmg To all whom 2t may concern sary thatthe stop fingers shall be a vertical section plate l3 and is provided Specification of Letters Patent.

Patented Feb. 22. 1916.

Application filed May 4, 1910. Serial No. 559,343.

Be it known that I, FRANK W. MEEGAN, a citizen of the United States, residingin the city of New York, in the county and State ,ofNew York,- have invented certain new and useful Improvements in Measuring-Q Pumps, of which the following is a speci 'cation.

In such pumps, as usually constructed t the amount of liquid to be delivered by each complete throw of the pump pistonis deter--. mined by means of a series of fingers, one or another of which, as desired, makes contact with a stop on the pump piston rod. Since the cylinder of such .a pump has usually a large cross-sectional area, it is necesratelylocated, since a slightdeparture from the proper position in either direction will result in a very considerable error in the amount of li uid delivered.

The object ofin'y improvements is to provide'for the exact location of the fingers with resultin accuracy in the output of the pump, and a so to prevent any change in the adjustment ofthe parts after they have been set in the proper position. p

The invention will be best understood by reference to the accompanying drawings, illustrating an embodiment thereof, Figure l of which shows a side elevation of a com. plete pump with my invention applied thereto. Fig. 2 shows aside elevation on an enlarged scale; Fig.3 a plan view, and Fig. 4 of the top of the rack-bar, by means of which the piston rod ofthe pump is. operated, with means for sealing the same in place; Fig. 5 shows a side elevation on an enlarged scale, and Fig. ,6 a plan view of an eccentric stop-finger; Fig. 7 shows a side elevation of the top of the threaded rod on which the stop-fingers are carried; Fig. 8 shows a side elevation of means for sealing the pump head in place; Figs. 9, 10, 11 and 12 show perspective views of modified forms of eccentric stop-fingers. Referring to the drawings, A indicates the cylinder of a self-measuring pump having a piston, a, and piston rod, c, arranged to be operated by suitable gearing engaged with a rack-plate, B, whiclris adjustably mounted on the piston rod, (In this instance the piston rod (1 extends through a longitudinal aperture in the rack bar or rack at its upper end with a threaded the rack bar, 'locked in their um and D a head, D, extend very aocu- .that, if the portion which engages threads in the upper end of the aperture in and the adjusted relation by means see Figs. 1 to akinclusive.) the cylinder head of the a head, supported by posts, (Z, (Z, to whichthe operating mechanism of e pumpiis, secured, and through which of the set nut I),

, indicates v passes the rack-plate, .B.

cylinder head, C, and the sin threaded rod, E, parallel with the rack-plate, B, the lower end of which is screwedj nto the cylinder head, C, and the upper end bf which engages the head, D, when the latter is set into place in assembling-the pump, as shown in, Fig. 7. Upon the threaded rod, E, are carried blocks-F, F F which are screwed thereon before the bee D, is set in place. The blocks, F, F F are of such size that they can be rotated around the rod, E, between the rack-plate, B, andathe post, d, and hence can be screwed up or down into de sired positions after the parts are assembled, Into each of the blocks, F, is inserted a stop-finger, G, tact with the rack-plate, B, when swung in one direction, and with the post, cl, when swung in the opposite direction, and arranged, when swung against the rack-plate, to make contact with a pin, H, which projects from the rack-plate, upon the upward, movement of the stop the upward movement the discharge of liquid. In order toinsure' quantities of liquid, I

Between the of the piston and provide for accurate parts are securely rack-plate, and thus I the delivery of exact of such length as to conad ustment of the point at which one of the l I stop-fingers, G, will come incontact with 9 the pin, H, as follows:

It will be understood cation of the point at which a stop-finger, G, is to make contact with the pin or stop, H depended entirely on the rotation of the block, F, on the threaded rod, E, the point reached might not determine the exact delivery of a given amount of liquid, since, unless a given number of turns of the block, F, on the rod, E, should bring it to such a position that the stop-finger, G, should make contact with the pin, H, at the exact moment when the required quantityof liquid has been delivered, it would be impossible to obtain exact adjustment by further vertical movement of the block, F,

- from saidceuter line, as

which'must be given an entire turn in order to bring the stop-finger, G, into position to contact with the pin, H, and hence would be carried past the required position by the vertical movement given by one complete rovertically adjustable, independent of the vertical movement of theblocks, F, in which they are inserted. This may be accomplished by. making the contact surface of the G, in planes which are at diij a ferent distances from the center line of that portion of it which is inserted in the block, as by making it a cylinder eccentric to:

stop-finger,

such center line as shown in Figs. 5 and 6,

or having a raised eccentric portion, as m which the finger 1s desshown in Fig. 9, ignated G and the eccentric portion 9 or with plane surfaces at different distances shown in Figs. 10 and 12 in which figures the finger is designated G and G respectively; or the entire stop-finger may be given a delicate vertical adjustment by providing it with a finely threaded portion engaging with a correspondingly threaded socket in the block, F, as shown in Fig. 11, in which the finger is designated G The blocks carrying the respective stop fingers may be conveniently marked as with P, Q, 1/2 G, etc., to indicate the amount of liquid expelled by the pump tive fingers limit or arrest the piston, indicating one pint, or .one quart, one-half gallon, etc., as indicated in Figs. 1, 9, 10 and 11. In assemblin the pump, when the block, F, has been bro lght as near as possible by rotating it on the rod, E, the stop-finger, G, is inserted therein and rotated until it is in such a position that the pin, H, vill come in contact therewith at the exact moment when the limited quantity of liquid has been delivered. In this manner a very exact'adjustment can be had and time the advantage of employing a threaded rod to carry the blocks, F, whereby any movement'of the blocks by reason of the impact of the pin, H, is prevented, is retained.

It will be understood that in ractice. any desired number of the blocks, F, carrying the stop-fingers, G, may be set upon the rod, E, the several stop-fingers being so adjusted that they will respectively contact with the been properly adjusted. This may be cut-- fected by means of a wire, IV, passed to the moment when their respecthe desired point p at the same the piston and through the relatively movable parts, the two ends of which are secured together by an identifiable seal, S, as, for example, the oiiicial seal of a sealer of weights and measures. In this way the integrity of the pump is-permanently guaranteed, and any attempt to misadjust it can be readily detected. For this purpose it is important that the stopfingers, G, shall be sealed to the blocks, F, after having been adjusted, and also that the upper end of the .rod, E, shall be sealed to the head, D, whereby rotation oi the rod is prevented. Still further security may be rovided by sealed wires, I engaging set screws, 0, e, which pass through the head,

D, into the rods, d, cl", and ears, 6, e, on the head, whereby any unauthorized removal or the head, D, is prevented, and also by sealed wire, Vi, engaging the top of the rack-plate,

plate and consequent change in the throw of the piston is prevented. only is any direct tampering with thefstopfingers, G, made impossible, but any-removal (if the head, I), through which a change in the relative position of the stop-fingers and the pin, H, might be indirectly efiected, by moving the rod, a, or the rack-plate, B, is also prevented. The presence of the seals in an unbroken condition. also indicates, and assures the customer, that the pump will deliver the exact amount of liquid called for. The importance of thus assuring a permanentl exact delivery will be readily appreciate by those skilled in the art.

What I claim as new and desire to secure by Letters Patent is: i

1. In a measuring pump, the combination with a cylinder and piston, a piston rod, vertical standards connected with the head of the piston and a head block carried by said standards, a rack bar connected with the piston rod, and extending through said head block and an actuating pinion on saidv head block engaging the rack bar, of a stop operatively connected with the rack bar, a vertically disposed threaded bar supported in the cylindrical head and head block and held from rotation, a plurality of rotatable blocks having interiorly threaded apertures engag ng said threaded rod, and a stop arm carried by each of said blocks, and adapted to be mowd into and out of operative relation, with the stop on said rack bar, said arms being of such length as to engage said rack bar and one at said standards to limit the rotary-movements of said blocks.

2. Ina measuring pump, the combination with a cylinder and piston. apiston rod, ver- In this manner not tical standards connected with the head of a head block carried by said standards, a rack bar connected with'the piston rod, and extending through said head block and an actuating pinion on said. head withsaid bar, ried by said rod, each thereof freely movable block engaging the 'rack bar, of a stop operativel connected with the rack bar, a vertical y disposed threaded bar supported in the cylinder head and head block and held from rotation, a plurality of rotatable blocks ently with respect to its rotatable block, in

a direction longitudinally of said threaded rod. 1

3. In a measuring pump, the combinationof a recip'rocable bar,

a stop thereon, arod parallel with said bar,

a plurality of blocks swung into and out of the. path of said stop, contacting portions on said blocks eccentrically mounted therein to permit vertical ad- =b justment relative to said sto andmeans to seal'said portions in theirad usted positions.

4. In a measuring pump, the combination with a reciprocable bar, of a rodparallel and a plurality of stops carthrough a definite arc and. arranged to be swung into and out ofa position to be ent frame, a reciprocable gagedby said bar, each of said stops including a movable eccentrically mounted portion arranged to engage said bar and to permit vertical adjustment of the stop and means for sealing said portions to the stops in their adjusted positions.

5. The combination in a of a reciprocable member, a rod parallel therewith,

measuring pump stops on said rod, each thereof mounted for limited swinging movement and arranged to be swung into a position to be engaged by said member, vertically adjustable portions for said stops and means to seal said portions in their adjusted positions.

6. In a measuring pump, a supporting bar for operating the piston rod, a stationary rod fixed to the frame in parallel relation to said bar, a member rotatably mounted onsaid rod and lfixed against longitudinal movement with reon said rod each thereof mounted for limit ed swinging movement and adapted to be spect thereto, an. eccentric' stop device mounted on a horizontal'axis in said member for vertical adjustment and beingtadaptedto swing into line withan abutment on said ed position.

- In testimony whereof, I have heremilo subscribed my name, this 28th day of April,

an and means to seal said device in adjust- 

